qit.invariant.gate_max_concurrence

qit.invariant.gate_max_concurrence(U: np.array[complex]) → float

Maximum concurrence generated by a two-qubit gate.

Returns the maximum concurrence generated by the two-qubit gate U (see [12]), starting from a tensor state.

Parameters

U (np.array[complex]) – \(U(4)\) matrix

Returns

maximum concurrence generated by U

Return type

float

Alternatively, U may be given in terms of a vector of three canonical local invariants.